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Linux KernelOperating system · Linux

CVE-2024-46692

MEDIUM · 5.5 CVSS v3.1 Published 2024-09-13
Fix available
A fix is available. Upgrade to 6.6.49 / 6.10.8 or later.
See remediation →
57/100
Remediation priority · Elevated
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In the Linux kernel, the following vulnerability has been resolved: firmware: qcom: scm: Mark get_wq_ctx() as atomic call Currently get_wq_ctx() is wrongly configured as a standard call. When two SMC calls are in sleep and one SMC wakes up, it calls get_wq_ctx() to resume the corresponding sleeping thread. But if get_wq_ctx() is interrupted, goes to sleep and another SMC call is waiting to be allocated a waitq context, it leads to a deadlock. To avoid this get_wq_ctx() must be an atomic call and can't be a standard SMC call. Hence mark get_wq_ctx() as a fast call.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-667

Shared resources are accessed without correct locking, so concurrent operations interleave into inconsistent — and sometimes exploitable — states, or deadlock the service outright. These bugs are subtle and timing-dependent. The fix is correct, consistent locking or atomic operations around every shared resource.

General guidance for the improper locking class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 6.3, < 6.6.49>= 6.7, < 6.10.8= 6.11

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 6.6.49 / 6.10.8 or later
Fixed in 6.6.496.10.8
Vendor patch git.kernel.org →
Recommended fix High confidence

Upgrade to kernel 6.6.49+, 6.10.8+, or 6.12+ depending on your current branch

  1. Identify the current running kernel version using `uname -r`
  2. If running a affected version (>= 6.3, < 6.6.49; >= 6.7, < 6.10.8; or 6.11), apply the vendor patch from commit 9960085a3a82c58d3323c1c20b991db6045063b0
  3. The patch modifies the get_wq_ctx() function in drivers/firmware/qcom_scm.c to use QCOM_SCM_QCOM_SMC_V2_ATOMIC_INDEFINITE_WAIT_FAST call instead of the standard QCOM_SCM_QCOM_SMC_V2_WAIT_FAST call
  4. Rebuild the kernel with the applied fix
  5. Reboot the system to the patched kernel
  6. Verify the fix is applied by checking the kernel version or reviewing the modified source file
Caveat This is a low-risk fix that changes SMC call classification from standard to atomic; should not affect functionality but does change low-level SCM behavior

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-46692 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
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  • Version or environment caveats, and links to real fixes
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